Adjusting means for bearings



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Oct. 3, 1933. F. J. HOHNHORST ET AL 1,928,590

' ADJUSTING MEANS FOR-BEARINGS I Filed Jul 10, 1931 2 Sheets-Shag: i

Oct 1933- F. J. HOI-I-INHORST ET AL 1,928,690

ADJUSTING MEANS FOR BEARINGS Filed July 10, 193i 2 Sheis-Sheet 2 //2 v va Patented Oct. 3, 1933 J 7 1,928,690 ADJUS IN Q Ferdinand J.Hohnhorstand Ferdinand J.

MEANs Fon BEARINGS v 1 m sa i i K Ap rilioation -July 10, 1931. Serial1%;549309 Q. .41 e (01. .30 f"189) Our invention frelatesto means for vadjusting 10,- for properly positioning the racew'ays relatively to eachother in order to properlyrelate the raceways and the rotatablefrictionreducing memj bers therebetween; and, further, to provide novel meanswhereby to adjust the distance between raceways'of 'a plurality ofbearings having coin cident axes (if/rotation;

The 'inventi n win be furt er ,fread iy understood. from the followingdescription;and claims, and from the drawings, in whichiatterz "291l'mg'w'l is central'axial ection of our improved.

device; taken inthe planie of the line 1+1 oi Fig.

2, and partly broken away, andexeniplifyin'g' the arbor asInon rotatinggQ i 'fFig. 2 an. axial section thereof, taken in the 5; plane of theline 2-2 Fig.1, and partly broken,

LLEigQB isa cross s-section hereof ,,taken in the plane of.theflineB BtEig. ,1. I

.Figie is a cross seqtionsof the sani eQtaken'in,

BQEIthe nlane-ofthe line H nt Eig,- 1, land partly broken away. i ,3 nh,

fe igh is a cross-section of thesame, taken in the p1ane'fof,-,; helinen- 5 of'Fig. 1, and partly brokenaway. Y

t; i" Figefiis acentrai axiallseotionof our improved devibecomprisingarotatable arbor, and taken on the line 6- 6 of Fig. {7; and partlybroken away; and I Fig. 7 is a centralxaxial section of the same, itaken on the line 7-7 of Fig:16', :and partly broken away, is" :1 1..

.. arbor'll has avmemberxl2 thereabout. The arborisshown as non-rotativeand the member as ,rotative in thesexemplification"of ourinventienrillustratedin Figs; land 2, and the arbor 111 is exemplifiedas: rotative' and. the member 112 thereabontwas non-Frotative in' Figs.6 andfl, The parts shown in Figs. 6 and. 7, similarto parts shown in:Figs; 1 to fivinclusive; are designated .JBearings 13, 14; areexemplifiedabout the arbor," "these bearingsincludinafriotion reducingmem sebers, which are 'eg cernplified balls 15i ree i received.

" by sinnlarreferenee numerals raised to the series bearings includeinner-f racewayscl fi and outer raoewaysl'l. v t

The member l2'inchicies asilpport 19, exemplk fied as a shell, havingactivity in; which ball cavity ha sja sh0u1fder22 against which theouterraceway of the ball bearing14isreceived. a spas-'1 ing collar 23 beinglocated, between the outer raceways of the respective bearings. .An endwall I 4 f r .thewcavity has threaded oonnectionjzs t and the spacincollariinthe shell. An end thrust memberzfi is "arrangedto move 1 one ofthe raceways' endwise foradjusting the with the shell, for clamping theouter raceways endwise relation between the racewa'ys oflthe 7 ballbearing In the arraQ ement shown the dis tance between the innerraceways. of the respec tive ball bearings is also adjusted, Theseadjustmerits provide for taking up wear between the raceways and theballs. v

The arbor, is provided With a. collar 31, which P ef a ly ld stationaryto the a r O if desired, may be partlof the arbor. It is shownpositioned endwise by an annular. shoulder 32 on the arbor. It isrotatively held. to the arbor, as by akey 33' in a notch 34 inthevcollar and receive i i a notch 35 in the arbor. The innerraoew y o tb ll bearin 14is'preferab1y also non; rotative "withrelation to thearbor. It is shown provided with a notch. 36 in which the key 33 is "Theendthrust member 26 is shownas a key in a slot 37 in the arbor. The key26has wings .38 whioh'e xtendto the outside r the arbor and haveshoulders 39 arranged to. exert anjend thrust upon the inner raceway ofthe ball bearing 13. It is also provided with fingers it) formed by as1ot41 o and'in ner enlargement 42 thereof; These f ngers are spring finer nd exert outwardpressure un nath wall' f the inn rbore'oi the innerrace 9 a bo H. t i

.A'sprine 45; shown as a spiral spring, is located. in a hole 46 inthe'arbon'j .This spring is, preferably a comparatively heavy. springand exerts very substantial end-wisepressure upon the innerracewayawhich is received over theends of the spring for compressingtheispring. V'Ihe'spring holds the inner raceway I non-rotativejithreiar 1 wisest .b'earingsj'ar lo at d. .The endwall 21 of this Q toadditionally steadysaid inner tion to the arbor. In the form shown thespring exerts outward pressure at both of its ends against the Wall ofthe bore of the inner raceway for frictionally holding the inner racewayto the arbor, permitting endwise adjustment of the inner raceway on thearbor.

The arbor is provided with a bore 51 in which there is a pin 52 whichmay have an inner reduced end 53. The inner end of the pin acts againstan end thrust face 54 of the key for moving the key endwise. Endwisemovement of the pin is shown accomplished by a screw 55 which hasthreaded connection 56 with the outer endof the. wall of the bore. Thisprovides a micrometer adjustment for the end thrust member. I r i Theinner end of this screw is preferably split, as shown by the split 57,for spreading the inner end of the screw for frictionally holding thescrew in adjusted positions in the threaded portion of the bore. Theouter end of the screw is provided with a key socket 58 for receiving'asuitable key for turning the screw and thereby adjusting the endwiseposition of the stem.

End spaces 59, 60, arelocated respectively be .tion reducing'membersbetween them, and tak-.

ingup any fwear between them, and definitely locating the raceways withrelation to each other; The bore 51 is preferably continued through thearbor, as at 61, for forming a lubricant pas-- sage' for filling thecavity 20'with lubricant for lubricatin the ballbearings. Y This bore isof greater diameter than the width of the key 26, the lubricantpassing'alongside said key in said-bore.

The outer end of the arbor may have a suitable lubricantffitting 62threaded therein and communicating with the bore 61, for supplyinglubricant into the cavity by means of a suitable force feed device forthe lubricant.

Our invention ,is especially useful in devices wherein the bearings aresubjected to great strains and great wear, and wherein continuedaccuracy in the bearing is required, for instance as shown and describedin our patents on mechanism for 65, rotatable about alstationary arboras in Patent No. 1,803,062, and in Fig. 6, the abrading wheel isexemplified at 165, rotatable with a rotatable arbor, as exemplified inPatent No. 1,526,496.

r The abrading wheel 65 is shown clamped between washers 66, 67, thewashers 66 abutting against an annular shoulder 68 of the shell 19, a

- nut 69 beingthreaded over the threaded end 70 of the shell forclamping the abrading wheel and the washers toward the shoulder 68.

The abrading wheel 165;is clampedto the arbor 111, washers 166, 167,being at the respective sides of the abrading wheel, a collar 164abutting against a shoulder 168 on the arbor 111 forming an end abutmentfor the washer 167, a nut 169 being threaded over the threaded end 170of the arbor for clamping the abrading wheel and the washers toward theshoulder 168.

The bearings of devices of this character are subjected to great wear,as they operate in the presence of abrasives, and the work performed bythem must be accurately done, so that proper centering of the abradingwheels and proper rotation thereof in true annular paths must bemaintained.

Our improved device provides especially efficient means for.accomplishing these purposes in machines of this character and in othermachines, and provides simple and efiicient means for main- 'taining theraceways of ball bearings in proper relation and for taking up wear, andwhereby delicate and accurate adjustments are obtained.

In the exemplification shown in Figs. 1 and 2, the arbor is a stationaryarbor and is suitably rigidly held in bearings 71, which may be part ofa suitable holder or frame of a machine. These bearings may be clampbearings as exemplified in the aforesaid Patent No. 1,803,062.

In the exemplification in Figs. 6 and 7, the arbor is rotatable, and hasthe rotatable element shown as the abrading wheel 165 thereon, asexemplified in 'the'a'foresaid Patent No. 1,526,496. The arbor rotateswithin a stationary shell 119, which may be part of a holder or suitableframe of a machine.

Having thus fully described our invention, what we claimnas'new, anddesire to secure by Letters Patent, is:

1. I'n'combination, an arbor, a member about said arbor, a bearingbetween said arbor and said member comprising an inner raceway, an outerraceway and rotatable friction reducing members between said raceways,said arbor provided with a lengthwise slot therethrough extending intosaid inner raceway, a fork in said slot provided with radially resilientparts insaid inner raceway exerting outward pressureupon the innerperiphery of said inner raceway, whereby to provide friction resistancebetween'said fork and said inner raceway, a stem extending lengthwise insaid arbor having operative connection with said fork for moving saidfork in axial direction, and adjusting means for adjusting said stemlengthwise in said arbor whereby to adjust the lengthwise relationbetween said-raceways. 1

2. In combination, an arbor, a member about saidarbor, a frictionreducing bearing between said arborand said member comprising an innerraceway, an outer raceway and rotatable friction reducingmembersbetween-said raceways, means 180 operatively disposed betweensaid arbor and said inner raceway comprising a spring transverse] heldin said arbor and positioned in said inner raceway and arranged forexerting outward pres sure upon the innerperiphery of said inner racewaywhereby to frictionally hold said inner raceway to said arbor and amendthrust member between said arbor and said inner raceway, and means foradjusting said end thrust member endwise whereby to move said innerraceway end- 1 0 wise onsaid arborlresisted by said spring for ad'-justingj the endwise relation between said raceways.

- ,3. In combination, -an-arbor, a member about 1 said arbor, -africtionreducing bearing between said arbor and said member comprisingan inner raceway, anouter raceway and rotatable friction reducingmembers between said raceways, said arbor provided with an endwise slottherethrough, a key in said slot provided with a wing extending "slottherethrough, a key in said slot having end outside said arbor andhaving operativeconnection with said inner raceway for causing combinedrotation of said arbor and said inner raceway, said key provided withradially resilient fingers in said inner raceway exerting outward springpressure upon the inner periphery of said inner raceway, and meansextending endwise in thrust connection with one of said spaced apartinner raceways, said key provided with radially resilient pressureexerting parts extending into said one of said inner raceways andarranged for exerting outward transverse pressure upon the innerperiphery of said one of said inner raceways whereby to cause frictionin axial direction between said key and said inner periphery, an axiallymovable stem in said arbor coincident with the lengthwise axis of saidarbor, and screw adjusting means between said arbor and said stem foradjusting said stem axially in said arbor so as to adjust the distancebetween said spaced apart inner raceways. t FERDINAND J. HOHNI-IORST.FERDINAND J. KROEGER.

